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N-alkane isomerization catalyst and preparation method thereof

A technology of n-alkane and catalyst, which is applied in the field of n-alkane isomerization catalyst and its preparation, can solve the problems of selectivity and catalytic activity that cannot meet the requirements of n-alkane isomerization, and achieve high catalytic activity and multi-branched The effect of isomerization selectivity

Active Publication Date: 2017-01-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this invention, the relatively acidic phosphotungstic acid is dispersed in the channels of mesoporous molecular sieves by impregnation to increase the active sites and exert its acidic effect. The need for isomerization of n-paraffins

Method used

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  • N-alkane isomerization catalyst and preparation method thereof
  • N-alkane isomerization catalyst and preparation method thereof

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preparation example Construction

[0017] The present invention provides a preparation method of n-alkane isomerization catalyst, comprising the following steps: (1) impregnating an alumina carrier with an aqueous solution of polyol and drying to obtain an alumina carrier treated with polyol; wherein the aqueous solution of polyol is The mass ratio of the contained polyalcohol and alumina support is 1-20 mass %; The concentration of the aqueous solution of polyalcohol is 1-15 mass %; (2) the alumina support that the polyalcohol treatment that obtains in step (1) is in Treating at 200-300° C. for 0.1-10 hours under an inert gas atmosphere to obtain the first intermediate; (3) supporting the active metal component platinum on the first intermediate obtained in step (2), and then drying to obtain the second Two intermediates; (4) reducing the second intermediate obtained in step (3) to obtain a third intermediate; (5) loading the heteropoly acid on the third intermediate obtained in step (4) , and then dried to ob...

Embodiment 1

[0036] Put 12.2g of xylitol solution with a concentration of 1.6% by weight in a rotary evaporator, add 10g of γ-Al 2 o 3 , impregnated at 60°C for 2 hours, and then rotary evaporated to dryness at 90°C for 2 hours to obtain an alcohol-treated carrier, which was loaded into a reactor and kept at 300°C for 2 hours under a nitrogen atmosphere to obtain the first intermediate.

[0037] Put the first intermediate above into a rotary evaporator, add 15 mL of chloroplatinic acid solution with a platinum content of 7.18 mg / mL, soak at 60°C for 4 hours, and then evaporate to dryness at 90°C to obtain the second intermediate.

[0038] The above-mentioned second intermediate is loaded into the reactor and subjected to reduction treatment to obtain the third intermediate, wherein the conditions of the reduction treatment include: the volume space velocity of hydrogen is 1200 hours -1 , the reduction temperature is 200°C, and the reduction time is 4 hours.

[0039] Then use 15mL of 0.35...

Embodiment 2

[0041] Put 12.9 g of sorbitol solution with a concentration of 7% by weight into a rotary evaporator, add 10 g of η-Al 2 o 3 , impregnated at 60° C. for 2 hours, and then evaporated to dryness at 90° C. to obtain an alcohol-treated carrier, which was loaded into a reactor, and kept at 300° C. for 2 hours under a nitrogen atmosphere to obtain the first intermediate.

[0042] Put the first intermediate above into a rotary evaporator, add 8 mL of chloroplatinic acid solution with a platinum content of 6.88 mg / mL, soak at 60°C for 4 hours, and then evaporate to dryness at 90°C to obtain the second intermediate.

[0043] The above-mentioned second intermediate is loaded into the reactor and subjected to reduction treatment to obtain the third intermediate, wherein the conditions of the reduction treatment include: hydrogen volume space velocity is 5 hours -1 , the reduction temperature is 100°C, and the reduction time is 10 hours.

[0044] Then, 8 mL of 0.41 g / mL silicotungstic a...

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Abstract

The invention discloses an n-alkane isomerization catalyst preparation method. The method comprises the following steps: using a polyol aqueous solution for dipping an alumina carrier and drying the carrier to obtain polyol-processed alumina carrier; processing the polyol-processed alumina carrier for 0.1-10 h under the inert gas atmosphere at the temperature of 200-300 DEG C to obtain a first intermediate; loading an active metal component platinum on the first intermediate, drying the material to obtain a second intermediate; performing reduction processing on the second intermediate to obtain a third intermediate; loading heteropoly acid on the third intermediate, and drying the material to obtain a catalyst product. The invention also provides a n-alkane isomerization catalyst prepared by the method. Compared with the prior art, the n-alkane isomerization catalyst of the invention has better catalytic activity and isomerization products selectivity.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a n-paraffin isomerization catalyst and a preparation method thereof. Background technique [0002] High-octane branched-chain alkanes have always been ideal gasoline components, and there are a large number of straight-chain alkanes in crude oil. Therefore, through isomerization technology, low-octane straight-chain alkanes are converted into high-octane ones. Linear alkanes are especially important. Since normal alkanes are prone to cracking reactions during isomerization, the yield of multi-branched alkanes especially with high octane number is reduced and the liquid yield is affected. Effectively controlling the formation of cracked products in the isomerization process and improving the selectivity of multi-branched isoparaffins has become the focus of catalyst development. [0003] CN100425583C discloses a method for preparing an alkane isomerization catalyst. The catalyst prepar...

Claims

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Application Information

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IPC IPC(8): B01J27/188B01J27/19B01J23/652C07C5/27C07C9/16
Inventor 李金芝龙军于中伟孔令江马爱增周涵
Owner CHINA PETROLEUM & CHEM CORP
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